vmix. already has Credit Roll in the new versions, Titles made in vMix can be changed on the fly, exactly as you are asking for. but if you do this,correcions made in the titles can be seen on the screen as you´re writing. so I don´t think somebody would like to correct titles while other people is seen what is being done. I´m operating vMix everyday and turn off the air the title if I need to do any correction.
Best Reggards

I would like to access vtask remotely, it may just be to give stop start connect and export. Because vtask is in an online machine and sometimes hangs I could simple to vtask remotely, without having to enter the machine with login, password etc .. to do this